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| 1 <!DOCTYPE html> | |
| 2 <html> | |
| 3 <head> | |
| 4 <meta charset="utf-8"> | |
| 5 <title>Loading a large texture using texImage2D</title> | |
| 6 <script src="../../../resources/js-test.js"></script> | |
| 7 <script src="resources/webgl-test.js"></script> | |
| 8 </head> | |
| 9 | |
| 10 <body> | |
| 11 <canvas id="canvas" width="64" height="64"></canvas> | |
| 12 <div id="description"></div> | |
| 13 <div id="console"></div> | |
| 14 | |
| 15 <script> | |
| 16 var successfullyParsed = false; | |
| 17 | |
| 18 function init() | |
| 19 { | |
| 20 if (window.initNonKhronosFramework) | |
| 21 window.initNonKhronosFramework(true); | |
| 22 | |
| 23 if (window.internals) | |
| 24 window.internals.settings.setWebGLErrorsToConsoleEnabled(false); | |
| 25 | |
| 26 description('Test loading a large texture using texImage2D'); | |
| 27 | |
| 28 runTest(); | |
| 29 } | |
| 30 | |
| 31 function andPixels(pixels32) { | |
| 32 var pixelsAnd = 0xffffffff; | |
| 33 for (var i = 0; i < pixels32.length; ++i) { | |
| 34 pixelsAnd &= pixels32[i]; | |
| 35 } | |
| 36 return pixelsAnd; | |
| 37 } | |
| 38 | |
| 39 function runTest() { | |
| 40 var width = 3900; | |
| 41 var height = 3900; | |
| 42 | |
| 43 var canvas = document.getElementById('canvas'); | |
| 44 var gl = canvas.getContext('webgl'); | |
| 45 | |
| 46 gl.pixelStorei(gl.UNPACK_COLORSPACE_CONVERSION_WEBGL, gl.NONE); | |
| 47 | |
| 48 var texture = gl.createTexture(); | |
| 49 gl.bindTexture(gl.TEXTURE_2D, texture); | |
| 50 | |
| 51 var image = new Image(); | |
| 52 image.onerror = function (e) { | |
| 53 testFailed('Image failed to load'); | |
| 54 } | |
| 55 image.onload = function () { | |
| 56 debug('Image width and height: ' + image.width + ', ' + image.height); | |
| 57 | |
| 58 if (image.width !== width || image.height !== height) { | |
| 59 testFailed('Image did not have expected dimensions.'); | |
| 60 return; | |
| 61 } | |
| 62 | |
| 63 var pixels = new ArrayBuffer(width * height * 4); | |
| 64 var pixels8 = new Uint8Array(pixels); | |
| 65 var pixels32 = new Uint32Array(pixels); | |
| 66 | |
| 67 if (width > gl.getParameter(gl.MAX_TEXTURE_SIZE) || | |
| 68 width > gl.getParameter(gl.MAX_RENDERBUFFER_SIZE)) { | |
| 69 // The image is allowed to be too big to be used as a texture. | |
| 70 finishJSTest(); | |
| 71 return; | |
| 72 } | |
| 73 | |
| 74 gl.texImage2D(gl.TEXTURE_2D, 0, gl.RGBA, gl.RGBA, gl.UNSIGNED_BYTE, image); | |
| 75 if (gl.getError() != gl.NO_ERROR) { | |
| 76 // Loading the texture is allowed to fail due to resource constraints. | |
| 77 finishJSTest(); | |
| 78 return; | |
| 79 } | |
| 80 var fb = gl.createFramebuffer(); | |
| 81 gl.bindFramebuffer(gl.FRAMEBUFFER, fb); | |
| 82 gl.framebufferTexture2D(gl.FRAMEBUFFER, gl.COLOR_ATTACHMENT0, gl.TEXTURE_2D,
texture, 0); | |
| 83 gl.readPixels(0, 0, width, height, gl.RGBA, gl.UNSIGNED_BYTE, pixels8); | |
| 84 | |
| 85 // The image is filled with white, ignore last bit of each subpixel to accou
nt for decoding rounding differences. | |
| 86 if ((andPixels(pixels32) & 0xfefefefe) !== (0xfefefefe | 0)) { | |
| 87 testFailed('Texture was not loaded correctly.'); | |
| 88 } | |
| 89 | |
| 90 finishJSTest(); | |
| 91 } | |
| 92 image.src = 'resources/white3900x3900.jpg'; | |
| 93 } | |
| 94 | |
| 95 init(); | |
| 96 </script> | |
| 97 </body> | |
| 98 </html> | |
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Chromium Code Reviews
Issue 2447493002:
Removed some duplicate layout tests under fast/canvas/webgl (Closed)
